<!--多张图片上传 双向绑定附件iconIds-->
<template>
  <div class="component-upload-image" v-if="fileList">
    <el-input v-model="showValue" disabled/>
    <el-upload
        :multiple="multiple"
        :action="uploadImgUrl"
        :data="{
          type: type,
          iconId:showValue
        }"
        list-type="picture-card"
        :on-success="handleUploadSuccess"
        :before-upload="handleBeforeUpload"
        :limit="limit"
        :on-error="handleUploadError"
        :on-exceed="handleExceed"
        ref="imageUpload"
        :before-remove="handleDelete"
        :show-file-list="true"
        :headers="headers"
        :file-list="fileList"
        :on-preview="handlePictureCardPreview"
        :class="{ hide: fileList.length >= limit }"
    >
      <el-icon class="avatar-uploader-icon">
        <plus/>
      </el-icon>
    </el-upload>
    <!-- 上传提示 -->
    <div class="el-upload__tip" v-if="showTip">
      请上传
      <template v-if="fileSize">
        大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b>
      </template>
      <template v-if="fileType">
        格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b>
      </template>
      的文件
    </div>
    <el-dialog
        v-model="dialogVisible"
        title="预览"
        width="800px"
        append-to-body
    >
      <img
          :src="dialogImageUrl"
          style="display: block; max-width: 100%; margin: 0 auto"
      />
    </el-dialog>
  </div>
</template>
<script setup name="EbIconUpload">
import {getToken} from "@/utils/auth.js";
import request from '@/utils/request'
import {onMounted} from "vue";
const baseUrl = import.meta.env.VITE_APP_BASE_API;
const props = defineProps({
  modelValue: [String,
    Object,
    Array],
  // 图片数量限制
  limit: {
    type: Number,
    default: 5,
  },
  // 大小限制(MB)
  fileSize: {
    type: Number,
    default: 5,
  },
  // 文件类型, 例如['png', 'jpg', 'jpeg']
  fileType: {
    type: Array,
    default: () => ["png",
      "jpg",
      "jpeg",
      "svg"],
  },
  // 是否显示提示
  isShowTip: {
    type: Boolean,
    default: true
  },
  // 上传的图片服务器地址
  uploadImgUrl: {
    type: String,
    default: () => import.meta.env.VITE_APP_BASE_API + "/common/uploadIcon"
  },
  type: {
    type: String,
    default: "ebAccountCategoryDefault"
  },
  multiple: {
    type: Boolean,
    default: false
  }
});
const {proxy} = getCurrentInstance();
const emit = defineEmits();
const number = ref(0);
const uploadList = ref([]);
const dialogImageUrl = ref("");
const dialogVisible = ref(false);
const headers = ref({Authorization: "Bearer " + getToken()});
const fileList = ref([]);
const showTip = computed(
    () => props.isShowTip && (props.fileType || props.fileSize)
);
onMounted(() => {
  fileList.value = []
})
const showValue = computed(
    {
      get() {
        if (props.modelValue) {
          let ids = []
          if (Array.isArray(props.modelValue) && props.modelValue.length) {
            ids = props.modelValue
          } else if (typeof props.modelValue == 'number') {
            ids = [props.modelValue]
          }
          if (ids.length > 0) {
            request({
              url: "/easybook/icons/listByIds",
              method: "post",
              data: ids,
            })
                .then((res) => {
                  fileList.value = res.rows.map((res) => {
                    res.url = baseUrl + res.url
                    return res
                  })
                })
          }
        }
        if (props.multiple) {
          return props.modelValue ? props.modelValue : []
        } else {
          return props.modelValue ? props.modelValue : undefined
        }
      },
      set(val) {
        emit("update:modelValue",
            val);
      }
    }
)
// 上传前loading加载
function handleBeforeUpload(file) {
  let isImg = false;
  if (props.fileType.length) {
    let fileExtension = "";
    if (file.name.lastIndexOf(".") > -1) {
      fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
    }
    isImg = props.fileType.some(type => {
      if (file.type.indexOf(type) > -1) return true;
      if (fileExtension && fileExtension.indexOf(type) > -1) return true;
      return false;
    });
  } else {
    isImg = file.type.indexOf("image") > -1;
  }
  if (!isImg) {
    proxy.$modal.msgError(
        `文件格式不正确, 请上传${props.fileType.join("/")}图片格式文件!`
    );
    return false;
  }
  if (props.fileSize) {
    const isLt = file.size / 1024 / 1024 < props.fileSize;
    if (!isLt) {
      proxy.$modal.msgError(`上传头像图片大小不能超过 ${props.fileSize} MB!`);
      return false;
    }
  }
  proxy.$modal.loading("正在上传图片，请稍候...");
  number.value++;
}
// 文件个数超出
function handleExceed() {
  proxy.$modal.msgError(`上传文件数量不能超过 ${props.limit} 个!`);
}
// 上传成功回调
function handleUploadSuccess(res,
                             file) {
  if (res.code === 200 && res.data) {
    if (props.multiple) {
      uploadList.value.push({
        name: res.data.fileName,
        url: baseUrl + res.data.url
      });
    } else {
      uploadList.value = [{
        name: res.data.fileName,
        url: baseUrl + res.data.url
      }];
    }
    uploadedSuccessfully({iconId: res.data.iconId});
  } else {
    number.value--;
    proxy.$modal.closeLoading();
    proxy.$modal.msgError(res.msg);
    proxy.$refs.imageUpload.handleRemove(file);
    uploadedSuccessfully({});
  }
}
// 删除图片
function handleDelete(file) {
  const findex = fileList.value.map(f => f.name)
      .indexOf(file.name);
  if (findex > -1 && uploadList.value.length === number.value) {
    fileList.value.splice(findex,
        1);
    //todo 删除图片的处理
    if (file && file.iconId) {
      showValue.value = JSON.parse(JSON.stringify(showValue.value.filter(item => item !== file.iconId)))
    }
    return false;
  }
}
// 上传结束处理
function uploadedSuccessfully({iconId}) {
  if (iconId) {
    if (props.multiple) {
      showValue.value = JSON.parse(JSON.stringify([...showValue.value,
        iconId]))
    } else {
      showValue.value = iconId
    }
  }
  if (props.multiple) {
    if (number.value > 0 && uploadList.value.length === number.value) {
      fileList.value = fileList.value.filter(f => f.url !== undefined)
          .concat(uploadList.value);
      uploadList.value = [];
      number.value = 0;
      proxy.$modal.closeLoading();
    }
  } else {
    fileList.value = uploadList.value
    number.value = 0;
    proxy.$modal.closeLoading();
  }
}
// 上传失败
function handleUploadError() {
  proxy.$modal.msgError("上传图片失败");
  proxy.$modal.closeLoading();
}
// 预览
function handlePictureCardPreview(file) {
  dialogImageUrl.value = file.url;
  dialogVisible.value = true;
}
// 对象转成指定字符串分隔
function listToString(list,
                      separator) {
  let strs = "";
  separator = separator || ",";
  for (let i in list) {
    if (undefined !== list[i].url && list[i].url.indexOf("blob:") !== 0) {
      strs += list[i].url.replace(baseUrl,
          "") + separator;
    }
  }
  return strs != "" ? strs.substr(0,
      strs.length - 1) : "";
}
</script>
<style scoped lang="scss">
// .el-upload--picture-card 控制加号部分
:deep(.hide .el-upload--picture-card) {
  display: none;
}
</style>
